EP0349967A1 - Procédé de transmission de données entre différents stations - Google Patents

Procédé de transmission de données entre différents stations Download PDF

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Publication number
EP0349967A1
EP0349967A1 EP89112143A EP89112143A EP0349967A1 EP 0349967 A1 EP0349967 A1 EP 0349967A1 EP 89112143 A EP89112143 A EP 89112143A EP 89112143 A EP89112143 A EP 89112143A EP 0349967 A1 EP0349967 A1 EP 0349967A1
Authority
EP
European Patent Office
Prior art keywords
main station
data
station
tokens
token
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89112143A
Other languages
German (de)
English (en)
Other versions
EP0349967B1 (fr
Inventor
Karlheinz Schreyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT89112143T priority Critical patent/ATE95018T1/de
Publication of EP0349967A1 publication Critical patent/EP0349967A1/fr
Application granted granted Critical
Publication of EP0349967B1 publication Critical patent/EP0349967B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0823—Errors, e.g. transmission errors
    • H04L43/0829—Packet loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route

Definitions

  • the invention relates to a method for data transmission between different stations, a main station and several substations, in a security dialog network, which is designed as a token ring, according to the preamble of patent claim 1.
  • the object of the invention is therefore to increase interference immunity, in particular if a plurality of substations are connected to the main station via a ring, and to achieve a reduction in false alarms.
  • tokens are now transmitted by the main station in an uninterrupted sequence. This means that there is always a sign on the line at every point of the ring.
  • a line fault such as a short circuit, interruption or manipulation, is only reported if no token arrives at the main station during the predefinable total fault detection time.
  • This has the advantage that if there are no tokens due to a short-term fault, a line fault is not immediately reported.
  • Another advantage is that in the case of transmission of data from a substation to the main station for line monitoring, these data are used. This means that if a substation has a request to send, it sends its useful telegram after it has received a token.
  • the information received is not immediately rejected in the case of an irreparable parity error in a development of the method according to the invention, but is stored in a memory provided for this purpose and, as usual, is negatively acknowledged. If the repetitions are now also incorrect, they are also stored in the memory.
  • the original information is reconstructed from the received and stored telegrams in the main station. This can be done, for example, by a simple majority vote. If this is not the case, then is only recognized after this attempt to reconstruct a line fault and a fault message is issued.
  • a hazard notification network is represented as a token ring with a main station H and seven sub-stations U1 to U7.
  • the main station H issues the tokens (TK) as a request signal to send ENQ on the line.
  • TK tokens
  • Each substation receives the token and, if it has no message to send, passes it on to the next station.
  • the main station monitors the arrival of the token.
  • FIG. 2 shows the number of incoming tokens TK at the main station for five sub-stations (5U) for the time t. Below this, the number of incoming tokens TK for ten substations (1OU) are shown in FIG. 3 for the same time range. For a maximum permissible fault detection time, e.g. one second, and for a given data transmission speed, the number of failed attempts leading to the alarm is set as high as possible. As can be clearly seen from FIGS. 2 and 3, it can be seen that the more substations are connected to a token ring, the smaller the number of attempts leading to the alarm.
  • FIG. 5 shows the number of tokens TK which are used for the Arrive main station (entry H). Those tokens that are disturbed or do not arrive are marked with crosses. As in FIG. 4, the original tokens are sometimes marked particularly strongly. For a given fault detection time STK, which is also shown in FIG. 5, in the previous method the failure of two (original) tokens would immediately lead to a message about a line fault. With the method according to the invention, however, no failure message will yet be issued if a whole series of tokens are absent. The timing diagram in FIG. 5 shows this clearly. Only when a single token does not arrive at the main station for the specified fault detection time STK is a fault message issued.
  • the consecutive tokens at the input of a substation are shown. If this substation has a transmission request, it sends its telegram after it has received a token. As a rule, a message telegram ME is longer than a token TK. Therefore, several tokens are received during the transmission time of the substation (FIG. 6). During this time, the substation issues its message ME at the exit (exit U). (FIG 7) The continuously received tokens are only passed on again when the message telegram has ended. According to the invention, the message (ME) of a substation (Un) is used for line monitoring in the main station (H), so that the following tokens are simply ignored while the messages are being received.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)
EP89112143A 1988-07-06 1989-07-03 Procédé de transmission de données entre différents stations Expired - Lifetime EP0349967B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89112143T ATE95018T1 (de) 1988-07-06 1989-07-03 Verfahren zur datenuebertragung zwischen verschiedenen stationen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3822893 1988-07-06
DE3822893 1988-07-06

Publications (2)

Publication Number Publication Date
EP0349967A1 true EP0349967A1 (fr) 1990-01-10
EP0349967B1 EP0349967B1 (fr) 1993-09-22

Family

ID=6358092

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89112143A Expired - Lifetime EP0349967B1 (fr) 1988-07-06 1989-07-03 Procédé de transmission de données entre différents stations

Country Status (3)

Country Link
EP (1) EP0349967B1 (fr)
AT (1) ATE95018T1 (fr)
DE (1) DE58905666D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7409550B2 (en) * 2004-08-16 2008-08-05 Mitsubishi Electric Research Laboratories, Inc. Method for binding networked devices

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
10TH CONFERENCE ON LOCAL COMPUTER NETWORKS, Minneapolis, Minnesota, 7.-9. Oktober 1985, Seiten 124-133, IEEE, New York, US; M.J. JOHNSON: "Reliability mechanisms of the FDDI high bandwidth token ring protocol" *
HITACHI REVIEW, Band 31, Nr. 3, Juni 1982, Seiten 125-130; J. KASHIO et al.: "32 Mb/s optical fiber loop network: H-8644" *
PROCEEDINGS 1986 INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY, ELECTRONIC CRIME COUNTERMEASURES, Gothenburg, 12.-14. August 1986, Seiten 57-58, IEEE, New York, US; R. VALLE ALARCON et al.: "Communication system approach to a security service" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7409550B2 (en) * 2004-08-16 2008-08-05 Mitsubishi Electric Research Laboratories, Inc. Method for binding networked devices

Also Published As

Publication number Publication date
DE58905666D1 (de) 1993-10-28
EP0349967B1 (fr) 1993-09-22
ATE95018T1 (de) 1993-10-15

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